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• changing command line arguments

  - by Shadi

  Hi, I am writing a C program. It takes its arguments from commandLine. I want to change the commandLine arguments in the code. As they are defined as "const char *", I can not change them using "strcpy", "memcpy", ... Also, you know, I can not just change their type from "const char *" to "char *". Is there any way to change them? Thank you so much in advance. Best regards, Shadi.

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• Getting started with microcontroller programming

  - by Trix

  I'm a fairly good programmer, knowledgeable in C, C++, Python, Ruby and PHP. I'd like to get started with microcontroller programming. I do know nothing about this topic. Microcontrollers are minimal computers on little circuit boards, right? I'm pretty new to electronics too, do I need to be an expert in it to do stuff with microcontrollers? What can I do with them? Would e.g.: A Pacman or Tetris game on an LCD be possible and not too hard? Where should I start? Basically I want to program something really small I can then take with me. This is my only real goal. Are microcontrollers the right thing for this, or are there better solutions? I'd like to do this for fun and as a hobby, I don't want to become a professional in it.

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• What is better for a student programming in C++ to learn for writing GUI: C# vs QT?

  - by flashnik

  I'm a teacher(instructor) of CS in the university. The course is based on Cormen and Knuth and students program algorithms in C++. But sometimes it is good to show how an algorithm works or just a result of task through GUI. Also in my opinion it's very imporant to be able to write full programs. They will have courses concerning GUI but a three years, later, in fact, before graduatuion. I think that they should be able to write simple GUI applications earlier. So I want to teach them it. How do you think, what is more useful for them to learn: programming GUI with QT or writing GUI in C# and calling unmanaged C++ library?

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• Microsoft chart

  - by user222820

  hi there i am writing a program in c# windows app and i use the microsoft chart component i have 100 string in an array and 100 double in an array and i wanna draw a chart with these arrays but i have a problem it draws chart with 5 or 6 column what shoud i do with this problem string[] dates = new string[100]; double[] values = new double[100]; for (int i = 0; i <= 99; i++) { dates[i] = "1/1/138" + i.ToString(); values[i] = i; } s.Series[0].Points.DataBindXY(dates, values);

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• All Targets Not Being Called (nested Targets not being executed)

  - by obautista

  I am using a two TARGET files. On one TARGET file I call a TARGET that is inside the second TARGET file. This second TARGET then calls another TARGET that has 6 other TARGET calls, which do a number of different things (in addition to calling other nested TARGETS (but inside the same TARGET file)). The problem is that, on the TARGET where I call 6 TARGETS, only the first one is being executed. The program doesnt find its way to call the 2nd, 3rd, 4th, 5th, and 6th TARGET. Is there a limit to the number of nested TARGETS that can be called and run? Nothing is failing. The problem is the other TARGET calls are not running. Thanks for any help you can provide. Oscar Bautista

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• How to progammatically extract audio mp3 from a youtube video using asp.net c#?

  - by Zap

  Does anyone have any sample asp.net C# code to extract the audio from a youtube video link and save it as a mp3 file. Someone recommended using wget and ffmpeg which I installed and am trying to shell a command, but get an exception below. Sample code is listed below. System.Diagnostics.Process proc = new System.Diagnostics.Process(); proc.EnableRaisingEvents = false; proc.StartInfo.FileName = "C:\\Program Files\\GnuWin32\\bin\\wget.exe http://www.youtube.com/get_video?video_id=... | ffmpeg -i - audio.mp3"; proc.Start();

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• What coding standards do you follow?

  - by Mark Szymanski

  I was just curious what coding standards people followed. I for one use the following: Brackets ALWAYS go on the next line. For instance: int main() { //Blah... } I never use code folding. (Yes my IDE's do support it (Xcode and Eclipse). Put related functions/methods single-spaced, otherwise double space. Here is an example: int foo = 0; printf("%d",foo); those are related while these are not: printf("Hello, World!"); return(0); I don't put else statements on the same line as the closing bracket for the preceding if statement. Most of the time in Java if a program needs multiple try catch statements I will just put the whole thing in one try catch.

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• problem installing rails3.0

  - by Themasterhimself

  Tried the link http://railscasts.com/episodes/200-rails-3-beta-and-rvm gokul@gokul-laptop:~$ ruby -v ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux] gokul@gokul-laptop:~$ mkdir -p ~/.rvm/src/ && cd ~/.rvm/src && rm -rf ./rvm/ && git clone git://github.com/wayneeseguin/rvm.git && cd rvm && ./install The program 'git' is currently not installed. You can install it by typing: sudo apt-get install git-core git: command not found gokul@gokul-laptop:~/.rvm/src$ sudo apt-get install git-core [sudo] password for gokul: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? gokul@gokul-laptop:~/.rvm/src$ anyone?

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• How to programaticaly gain root privileges ?

  - by ereOn

  I am writing a software (in C++, for Linux/Mac OSX) which runs as a non-privileged user and but needs root privileges at some point (to create a new virtual device). Running this program as root is not a option (mainly for security issues) and I need to know the identity (uid) of the "real" user. Is there a way to mimic the "sudo" command behavior (ask for user password) to temporarily gain root privileges and perform the particular task ? If so, which functions would I use ? Thank you very much for your help !

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• Python: Why Does a Method Behave Differently with an Added Parameter?

  - by SteveStifler

  I have a method in a Pygame Sprite subclass, defined as such: def walk(self): """move across screen""" displacement = self.rect.move((self.move, 0)) if self.rect.left < self.area.left or self.rect.right > self.area.right: self.move = -self.move displacement = self.rect.move((self.move, 0)) self.rect = displacement I modified it, adding a parameter speed_x, and now the program is broken. def walk(self, speed_x): """move across screen""" displacement = self.rect.move((speed_x, 0)) if self.rect.left < self.area.left or self.rect.right > self.area.right: speed_x = -speed_x displacement = self.rect.move((speed_x, 0)) self.rect = displacement Before I called the method like this: def update(self): self.walk() Now I do: def update(self): self.walk(self.move) Why doesn't this work?

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• How can I access and change elements in this private readonly property?

  - by CrimsonX

  I'm trying to figure out how I am able to successfully change a "readonly" array. I have this: namespace ConsoleApplication1 { class Program { static void Main(string[] args) { MyClass myClass = new MyClass(); myClass.Time[5] = 5; // How is this legal? } } public class MyClass { private readonly uint[] time; public IList<uint> Time { get { return time; } } public MyClass() { time = new uint[7]; } } } As I Note above, I would expect that Time[5] would be illegal due to the fact that public IList Time does not have a setter. Additionally, how can I create an array in the constructor which is read-only and unchangeable outside of this class?

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• Does UIActivityIndicator require manual threading on iPhone

  - by Akusete

  I am running creating an iPhone application which performs a costly operation and I wanted to create an activityIndicator to let the user know the application has not frozen. The operation is performed entirely in one event call... so there is no chance for the UI framework to receive control to actually display and animate this indicator. The sample apps which use the UIActivityIndicator (or any other similar animation) start and stop the animation in different events, triggered separately at different stages of the program. Do I need to manually create a separate thread to run my operation in, or is there already default support for this kind of behavior?

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• Genetic programming in c++, library suggestions?

  - by shuttle87

  I'm looking to add some genetic algorithms to an Operations research project I have been involved in. Currently we have a program that aids in optimizing some scheduling and we want to add in some heuristics in the form of genetic algorithms. Are there any good libraries for generic genetic programming/algorithms in c++? Or would you recommend I just code my own? I should add that while I am not new to c++ I am fairly new to doing this sort of mathematical optimization work in c++ as the group I worked with previously had tended to use a proprietary optimization package. We have a fitness function that is fairly computationally intensive to evaluate and we have a cluster to run this on so parallelized code is highly desirable. So is c++ a good language for this? If not please recommend some other ones as I am willing to learn another language if it makes life easier. thanks!

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• PHPIniDir broken under windows 7?

  - by bobbyb

  I had a server running on a windows xp machine using apache2 with php and mysql. I've recently upgraded to windows 7 and have been having trouble getting it to work. Apache works fine and php works, but I can't seem to get it to work with a php.ini file. When I set PHPIniDir to a directory with a php.ini file, the Apache service does NOT start. When I set PHPIniDir to a directory with NO php.ini file, the Apache service does start. When I leave out PHPIniDir, the Apache service does not start. Has anyone found a fix for this problem? Thanks! EDIT: PHPIniDir "C:\Windows" #works (no php.ini file) PHPIniDir "C:\Program Files (x86)\php\" #does not work (contains php.ini file) i enable at most one at any given time.

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• Where are the static methods in gcc's dump file.c.135r.jump

  - by Customizer

  When I run gcc with the parameter -fdump-rtl-jump, I get a dump file with the name file.c.135r.jump, where I can read some information about the intermediate representation of the methods in my C or C++ file. I just recently discovered, that the static methods of a project are missing in this dump file. Do you know, why they are missing in that representation and if there is a possibility to include the static methods in this file, too. Update (some additional information): The test program, I'm using here, is the Hybrid OpenMP MPI Benchmark. Update2: I just reproduced the problem with a serial application, so it has nothing to do with parallel sections.

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• Implementing backspace using outtextxy in graphics.h in c

  - by vinit

  Yersterday I was trying to create a text editor in c. but i am facing a problem with the backspace character. and when i am trying to print this with outtextxy a strange character is appearing. i tried following code for this backspace: str[2]="\b "; outtextxy(x,y,str); This is working fine under textmode but not working under graphics mode. If you r having any solution please help me I hav to submit my program on monday. And Thanks in advance

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• How to obtain specific Excel object library without the corresponding Office version installed.

  - by james-h-l

  I am developing a Excel automation app that read and write to Excel spreadsheet. I have Office 2007 installed on my machine. I therefore can reference the Excel 12.0 Object Library and the Excel 5.0 Object Library. I don't want to use Excel 5.0 because it's really quite old and poorly documented. Therefore I'm referencing Excel 12.0. However the target machine have Office 2003 installed and therefore only have Excel 11.0. So when I compile my program it crashes on the target machine since the referenced library are different. I was wondering is there a way I could obtain the Excel 11.0 without installing Office 03? I tried to find answers from msdn and microsoft support page but couldn't find anything? This is quite strange since it could also happen in the future where developers has newer editions of Office than clients?

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• How do I prevent WIX CAQuietExec from logging the command line?

  - by Noel Abrahams

  In order to prevent command windows from popping up during installation I am using the WIX built-in custom action CAQuietExec. First I define the command line: <CustomAction Id="A01" Property="QtExecCmdLine" Value="&quot;MyExe.exe&quot; /password [PASSWORD]" /> NB: The PASSWORD property is defined as Hidden. This prevents the Windows installer from writing the property value to the log. Then I call into the embedded WIX extension: <CustomAction Id="A02" BinaryKey="WixCA" DllEntry="CAQuietExec" Execute="immediate" Return="ignore" /> This works fine. However, when I go to the temp folder and open up the MSI log I see the following entry: CAQuietExec: "C:\Program Files\MyExe.exe" /password INCLEARTEXT I.e. the password is displayed in clear text and not hidden. How do I prevent the CAQuietExec from logging the password in clear text?

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• How to structure a database with questions and answers?

  - by Andreas Johannessen

  Hi I am going to make a simple application that uses a database. I could need some guidance on how to structure it. I shall make question program. What I have in mind is. One table with questions One table with the difficulity of the question One table with the category of the question However, what do I do with the answers? Have them as seperate columns in the question-table? It sounds like a bad practice.(Also, where do I have the correct answer) Each question will have 5 answers where only one of them is correct.

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• word ladder in python

  - by user365523

  I'm trying to create a word ladder program in python. I'd like to generate words that are similar to a given word. In c++ or java, I would go through each valid index in the original string, and replace it with each letter in the english alphabet, and see if the result is a valid word. for example (pseudocode) for (int i = 0; i < word.length(); i++) { for (every character c in the alphabet) { change the letter of word at index i to be c. if the result is a valid word, store it in a list of similar words } } . However, this doesn't seem like a very "python" way of doing things. How would I approach this problem in python?

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• How can I check that I didn't break anything when refactoring?

  - by Nathan Fellman

  I'm about to embark on a bout of refactoring of some functions in my code. I have a nice amount of unit tests that will ensure I didn't break anything, but I'm not sure about the coverage they give me. Are there any tools that can analyze the code and see that the functionality remains the same? I plan to refactor some rather isolated code, so I don't need to check the entire program, just the areas that I'm working on. For context, the code I'm working on is in C/C++, and I work in Linux with GCC and VIM.

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• How can I add styles to dynamically added table cells?

  - by Doc Hoffiday

  In my program I have a table that, when loaded, has jQuery add some styles/classes to the table cells and table headers. Everything works fine until rows are added via functionality on the rest of the page. Instead of adding the classes to the table cell during addition, is it possible to "listen" or fire some event that checks to see if child elements were added to the table. Essentially, I want something functionally equivalent to this: $("#table td").live("ready", function(){ // do something }); but the live/ready won't work on a table cell... Any ideas?

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• Prolog term concatenation

  - by d0pe

  Hi, I'm trying to format a result from a program but getting an hard time. I wanted to give something like this as result: Res = do(paint(x) do(clean(a), do(repair(b) , initialState))) basically, I want to concatenate successive terms to initialState atom but, it doesn't work with atom_concat since the other terms to concatenate aren't atoms and also I wanted to add the ) everytime I pass through the "do" function. So it would be something like: Res = initialState. When do function was called, I would have a function like concatenateTerm(Pred, Res, Res). Pred beeing repair(b) for instance and obtain the result: res = do(repair(b), initialState). Is this possible to be done? Thanks

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• Detect if camera is capturing in Flash

  - by Ben

  I'm having trouble with Camera.getCamera() in Flash AS3. If there are multiple camera drivers, it does not necessarily pick the correct one. If the default is the correct, the program works fine; however, if another driver is selected as the default then LED on the webcam does not come on and no video is captured. I can cycle through the available cams and select an arbitrary one. I don't, however, know how to determine if the selected camera is correct. It is not returning null. I considered using camera.currentFPS, but it's not clear when this gets updated. I'm really struggling to determine dynamically which camera will do the trick!

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• How do you reach a "flow" state while programming?

  - by acrosman

  I'm not talking about program flow, but as in the state of working called flow, the state where you can get great work done the most effectively. I find that my current work environment while good in many ways does not allow me to get into a good state of mind for writing code most of the time (my job includes many other functions). If it's critical to get something done I'll often put on head-phones with classical music and try to drown out the office noise around me (and discourage co-workings from asking me questions). I am best able to get work done late in the evening when the house is quite and I've been thinking about the project for most of the day. What tricks have you found when working in less then perfect office environments?

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